Improve netcode and simplify (#4)

- Simplify the logic wherever possible to remove overengineering and simplify the netcode
- Actually improve the netcode
- The new lines are mainly the package locks and tests

Reviewed-on: https://home.schmelczer.dev/git/andras/decla-red/pulls/4

backend/src/game-events.ts

@@ -0,0 +1,17 @@
+import { CharacterTeam } from 'shared';
+
+export interface GameEvents {
+  addPoints(blue: number, red: number): void;
+  announce(text: string): void;
+}
+
+export const addPointsForTeam = (
+  game: GameEvents,
+  team: CharacterTeam,
+  points: number,
+): void => {
+  game.addPoints(
+    team === CharacterTeam.blue ? points : 0,
+    team === CharacterTeam.red ? points : 0,
+  );
+};